Practical radio trigger, but consider use before buying

I tested the system with a Hähnel Tuff EOS5D, 2x Canon 580EX II and a Canon 430EX.
One has to understand the basic function of the Tuff-system to make a choice right. 1. Any number of receivers are controlled by a transmitter. That is in itself practically. The control of two 580EXII works so that the camera handled the lightning as a single. Practically with larger objects that are so very evenly illuminated. The flash output level compensation on the camera lightning affects both equally. For me, disappointing is the fact that the power can be reduced, for example a stage not in a flash and then has a setup with the main and fill light. The attempt to change the CF function on 580er (power correction only allow the flash) was unsuccessful. The Tuff overrides in ETTL mode all power corrections to the flash and the camera are regulations further. You have to accept. The solution now is to manually adjust the additional flashes and thus to have a fixed reference point. The power correction of the camera affects only the flashes in ETTL mode. So it goes, but it is of the Canon standard with the ST-E2, as we know, allows two groups and different flash ratios can adjust to each other, far away.
2. The Canon 430EX only works with firmware version V1001 in ETTL. If you have thus caught a very topical Tuff-Set (with V1003), the flash will always be fired at full power. There remains only the manual mode, unless you flash the old firmware on it. According to a statement from the company. Hahnel is available for the 430EX and the 580EXII the V1001 without restrictions. The software would have to get through the support of Haehnel (I have done so).
Conclusion: If you come by the above peculiarities rightly, is on the robust and reliable system have joy. Who puts on a group control value and individual lighting setups like, should view the Hahnel Viper to time. In practice, the fast changing the flash output on Viper transmitter certainly beneficial, even if no ETTL is possible.
Update as of 20:05:14: The above mentioned problems have yet very bothered me and so I ordered 4 Yongnuo YN-622C. Without having to adjust anything about it, I could use them right away, and now works as e-TTL flash with two flashes parallel and individual flash output level compensation. Here the Hahnel Funkauslöser must admit defeat, even if their rugged rubber wraps are better suited for everyday use, as the unprotected Yongnuo housing.